throw new CrawlerSystemException("The inputstream is null.");
        }
        try {
            @SuppressWarnings("resource")
            final VisioTextExtractor visioTextExtractor = new VisioTextExtractor(in);
            return new ExtractData(visioTextExtractor.getText());
        } catch (final IOException e) {
            throw new ExtractException(e);
        }
    }